This 2.0L Hydration Bladder / Reservoir System is food grade, leak proof, easy to clean, anti-bacterial, and BPA-Free. Holds water from -4℉ to 122℉ (-20℃ to 50℃). It's extremely easy to fill and insert into the hydration pack or backpack. The large opening allows you to add ice cubes to keep your water cool for a long time. The SA-HB1 2L hydration bladder is the best choice to stay hydrated when you go outdoors for camping, cycling, hiking, biking or running, YOU WILL LOVE IT for sure.